Text waves in Igor Pro

A text wave holds strings, and most numeric operations do not apply to it.

Function/WAVE LabelWaves(WAVE values, Variable cut)
    Make/O/T/N=(numpnts(values)) labels
    WAVE/T labels

    labels = SelectString(values[p] > cut, "low", "high")
    labels[0] = "reference"

    Variable high = 0
    high = sum(values, 0, inf) > cut ? 1 : 0
    String overall = SelectString(high, "low", "high")
    Printf "first label %s, overall %s\r", labels[0], overall

    return labels
End

How it works

1. Make/T makes one; WAVE/T is the reference type.
2. Assignment works the same way, with p indexing the points.
3. SelectString is the string answer to the ternary operator.

Keywords and builtins used here

• End
• Function
• Make
• Printf
• SelectString
• String
• Variable
• WAVE
• inf
• numpnts
• return
• sum

The run, in numbers

Lines

14

Characters to type

368

Tokens

89

Three-star pace

75 tpm

At the three-star pace of 75 tokens a minute, this run takes about 71 seconds.

Type this snippet

Step 4 of 4 in Text, step 15 of 18 in Language basics.

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